When you hear the term semi-automatic power tools, don't you immediately think of Tim "The Tool Man" Taylor?
This souped-up screw driver is a full throttle screwing machine -- get your mind out of the gutter. It features a gun-like sliding action that looks menacingly violent. Although it might look like a gun, you can remain calm. It doesn't have the make up to actually shoot anything, but it will screw in a doorknob before you can say "go!"
This semi-automatic power tool comes with 12 different driving bits and has two rapid reload cartridges, which hold 6 bits each. Since it's all about speed here, the cartridges are designed to be easy to change with a single slide. As far as semi-automatic power tools go, this one is reasonably priced on Amazon at just under $50.